| Description | Date | Identifier | |
| Design and implementation of a dimmer switch for the Goshawk 11 headlamps. | 27th Oct 1922 | West Wittering \ I \ October1922 Scan39 | |
| Design of dipping headlights for the Goshawk, comparing a dimmer switch to using side lights. | 26th Oct 1922 | West Wittering \ I \ October1922 Scan40 | |
| The testing and issues found with the Goshawk II magneto ignition system. | 4th Oct 1922 | West Wittering \ I \ October1922 Scan41 | |
| Magneto timing, potential issues, and a recommendation for supplying cars with a pre-prepared magneto setup. | 4th Oct 1922 | West Wittering \ I \ October1922 Scan42 | |
| Test report on the Goshawk II silencer and cutout, detailing issues with noise levels and power output. | 4th Oct 1922 | West Wittering \ I \ October1922 Scan43 | |
| The design and efficiency of various Goshawk engine silencers, including a new design with a cutout. | 4th Oct 1922 | West Wittering \ I \ October1922 Scan44 | |
| The advantages and disadvantages of an exhaust cutout system on a 40/50 model. | 10th Oct 1922 | West Wittering \ I \ October1922 Scan45 | |
| Test report comparing horsepower output with various silencer configurations at different engine speeds. | 17th Oct 1922 | West Wittering \ I \ October1922 Scan46 | |
| Mr. Royce's strict weight limits for the Goshawk car, covering the chassis, body, passengers, and springs. | 17th Oct 1922 | West Wittering \ I \ October1922 Scan47 | |
| The importance of weight-saving on the chassis versus the weight of bodies and accessories. | 4th Oct 1922 | West Wittering \ I \ October1922 Scan48 | |
| Evaluating the performance of the No. 6 Goshawk car, focusing on its steering, control, and unsatisfactory suspension compared to the No. 4 model. | 10th Sep 1922 | West Wittering \ I \ October1922 Scan49 | |
| Excessive oil consumption and smokey exhaust in Goshawk II engines, detailing a solution by modifying the piston scraper ring. | 9th Oct 1922 | West Wittering \ I \ October1922 Scan50 | |
| Adopting a bevelled scraper ring for maximum efficiency over other solutions. | 9th Oct 1922 | West Wittering \ I \ October1922 Scan51 | |
| Effects of deeper radiators, bigger fans, and compression on water temperature. | 9th Oct 1922 | West Wittering \ I \ October1922 Scan52 | |
| Change of axle ratios on the Goshawk-11 car for demonstration purposes. | 10th Oct 1922 | West Wittering \ I \ October1922 Scan53 | |
| Shock absorber settings and axle ratio for a 6-Goshawk-11 vehicle. | 2nd Oct 1922 | West Wittering \ I \ October1922 Scan54 | |
| Arrangements to road test the modernised 7-Goshawk-11 car in France after the Paris Show. | 12th Oct 1922 | West Wittering \ I \ October1922 Scan55 | |
| The Goshawk 11 magneto, discussing the choice between magneto and battery ignition systems. | 12th Oct 1922 | West Wittering \ I \ October1922 Scan56 | |
| Adjustment of road spring ratings for cars intended for export markets with rougher roads. | 26th Oct 1922 | West Wittering \ I \ October1922 Scan57 | |
| Elusive battery ignition trouble observed on production Goshawk chassis. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan58 | |
| Investigating and attempting to rectify ignition coil weakness through improved insulation and paraffin wax treatment. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan59 | |
| Analysis of ignition coil weakness and misfiring related to ballast resistance and spark timing. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan60 | |
| Analysis of ignition coil performance, focusing on ballast resistance, magnetic saturation, and operating voltage. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan61 | |
| Analysis of ignition coil performance, comparing the Goshawk and 40/50 engines and experimenting with different secondary winding turns. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan62 | |
| Analysis of coil performance trials, comparing different winding turns and ballast resistances. | 28th Oct 1922 | West Wittering \ I \ October1922 Scan63 | |
| Analysis of ignition coil performance, discussing issues with ballast resistance, current draw, and potential misfiring in Goshawk engines. | 28th Oct 1923 | West Wittering \ I \ October1922 Scan64 | |
| Ignition coil improvements and variations for the Goshawk chassis, comparing different constructions and turn counts. | 28th Oct 1923 | West Wittering \ I \ October1922 Scan65 | |
| Replacement of thick leaf springs with thin leaf springs, considering cost and performance. | 26th Oct 1922 | West Wittering \ I \ October1922 Scan66 | |
| Conclusions on chassis design, shock dampers, and tyre pressures for 20.HP and 40.HP models. | 13th Oct 1930 | West Wittering \ I \ October1922 Scan67 | |
| Different types of rectifiers for chassis batteries, recommending the B.T.H. Tungar rectifier. | 31th Oct 1922 | West Wittering \ I \ October1922 Scan68 | |
| Covering memo for reports on the operation of a Westinghouse Spark & Ignition Tester. | 31th Jan 1922 | West Wittering \ I \ October1922 Scan69 | |
| Instructional report on the trial of a Westinghouse Spark-C Ignition Tester. | 26th Jul 1922 | West Wittering \ I \ October1922 Scan70 | |
| Instructions and test results for an ignition tester under various spark plug conditions. | 26th Jul 1922 | West Wittering \ I \ October1922 Scan71 | |
| Instructions detailing the operational limitations of an ignition testing instrument when used with spark gaps. | 26th Jul 1922 | West Wittering \ I \ October1922 Scan72 | |
| Instructions for interpreting test results based on flash brilliancy and gap width. | 26th Jul 1922 | West Wittering \ I \ October1922 Scan73 | |
| Instructions on the operation and testing of a Westinghouse 'Spark-C' Tester. | 20th Oct 1922 | West Wittering \ I \ October1922 Scan74 | |
| Instructions on the behaviour of spark gaps, high-frequency oscillations, and voltage. | 6th Nov 1918 | West Wittering \ I \ October1922 Scan75 | |
| Instructions for diagnosing spark plug faults using a tester based on the resulting light glow. | 6th Nov 1918 | West Wittering \ I \ October1922 Scan76 | |
| Concluding that the butterfly valve for exhaust heating on the EAC carburetter is a nuisance and should be reverted to a water-heated throttle. | 1st Sep 1925 | West Wittering \ I \ September1922 Scan0 | |
| Modifications to the Goshawk 11 steering system for the first production cars. | 11th Sep 1922 | West Wittering \ I \ September1922 Scan1 | |
| Steering troubles on the Goshawk 11 front axle and Mr. Royce's opinion on a solution. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan2 | |
| Analysis of knocking gears and potential causes related to the camshaft drive and crankshaft impulses. | 5th Sep 1922 | West Wittering \ I \ September1922 Scan3 | |
| Methods to manage crankshaft speed irregularities using flywheels and experimental setups. | 26th Apr 1917 | West Wittering \ I \ September1922 Scan4 | |
| Inquiry regarding conclusions on the design of spring shackles and bushes for the export chassis. | 6th Sep 1922 | West Wittering \ I \ September1922 Scan5 | |
| Clarifying Mr. Royce's decision on raising a chassis by .5 inches. | 7th Sep 1922 | West Wittering \ I \ September1922 Scan6 | |
| Distributing a coloured diagram and explanation for a new electrical silent starter control system. | 19th Sep 1922 | West Wittering \ I \ September1922 Scan7 | |
| On Goshawk steering, noting Mr. Royce's dislike for raising the No.4 Goshawk 11 car by .5 inches. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan8 | |
| M.sch. 1322, detailing the dumb iron and front shackle for the front springs applicable to Goshawk, Stork, Curlew, and Vulture models. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan9 | |
| Dispatch of drawings for Goshawk 11 radiator shutters. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan10 | |
| Complexity and timeline for fitting new springs and a new rear brake system to the Hawk-Northcliffe axle. | 11th Sep 1922 | West Wittering \ I \ September1922 Scan11 | |
| Repair and subsequent sale of a Delage car, as per Mr. Royce's suggestion. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan12 | |
| Telegram from Royce requesting 'Six exi' be sent to Wittering for reference on electrical equipment. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan13 | |
| Potential modifications and material changes for the Goshawk engine induction pipe. | 14th Sep 1925 | West Wittering \ I \ September1922 Scan14 | |
| Drawings for the controls of hand-operated shutters for the Goshawk 11. | 15th Sep 1922 | West Wittering \ I \ September1922 Scan15 | |
| Telegram received by telephone concerning the trial of a Goshawk silencer. | 15th Sep 1922 | West Wittering \ I \ September1922 Scan16 | |
| Piston ring stops for the 40/50 chassis and a new method from America. | 15th Sep 1922 | West Wittering \ I \ September1922 Scan17 | |
| The return of a Delage car to Derby before its sale. | 16th Sep 1922 | West Wittering \ I \ September1922 Scan18 | |
| Recommendation to modify the clutch pedal with a longer lever to reduce the pressure required for operation. | 16th Sep 1922 | West Wittering \ I \ September1922 Scan19 | |
| Mr. Royce's conditional approval for a Gleason gears arrangement on chassis prior to 1700. | 16th Sep 1922 | West Wittering \ I \ September1922 Scan20 | |
| Feedback on the road test of a Goshawk model, detailing performance, issues, and suggestions for improvement. | 18th Sep 1922 | West Wittering \ I \ September1922 Scan21 | |
| Broken spoke on a Dunlop wire wheel fitted to a Goshawk 11. | 18th Sep 1922 | West Wittering \ I \ September1922 Scan22 | |
| Feedback from the Liverpool agent on the excellent performance of a loaned 4-Goshawk-11 car after a weekend test drive. | 20th Sep 1922 | West Wittering \ I \ September1922 Scan23 | |
| Further notes from a visit regarding design modifications for various vehicle components. | 20th Sep 1922 | West Wittering \ I \ September1922 Scan24 | |
| Series of technical notes on design and production improvements for various vehicle components. | 1st Jun 1919 | West Wittering \ I \ September1922 Scan25 | |
| Notes on Goshawk engine steering and fan modifications. | 28th Sep 1934 | West Wittering \ I \ September1922 Scan26 | |
| Request for a power curve of the Hawk-Northcliffe with a Claudel-Hobson carburetter at the same compression. | 21th Sep 1922 | West Wittering \ I \ September1922 Scan27 | |
| Drawing No. LeC 1621 for the Goshawk hand lever for shutters. | 21th Sep 1922 | West Wittering \ I \ September1922 Scan28 | |
| Requesting the construction of a pogo stick-like pedal pressure indicator for the Experimental department, referencing drawing Lec 1627. | 22th Sep 1922 | West Wittering \ I \ September1922 Scan29 | |
| Single quenching process for 5% case-hardened nickel steel gears. | 22th Sep 1922 | West Wittering \ I \ September1922 Scan30 | |
| Telegram from Royce to Hives about the need for open cars in Paris and one car for photography. | 25th Sep 1914 | West Wittering \ I \ September1922 Scan31 | |
| Manufacturing and performance issues of front springs for the Phantom and 20HP models. | 23th Sep 1925 | West Wittering \ I \ September1922 Scan32 | |
| Wing stays, wiring, and bolt-locking on Goshawk cars. | 25th Sep 1922 | West Wittering \ I \ September1922 Scan33 | |
| Confirmation of a wire, requesting the immediate dispatch of one switchbox for Goshawk 11. | 26th Sep 1922 | West Wittering \ I \ September1922 Scan34 | |
| Fitting a Goshawk II dynamo and motor onto a Goshawk I engine. | 26th Sep 1922 | West Wittering \ I \ September1922 Scan35 | |
| Request for four size 5 millboards and two yards of tracing cloth to be sent with the No.4 Goshawk 11 car. | 28th Sep 1922 | West Wittering \ I \ September1922 Scan36 | |
| Drawings LeC 1629 and LeC 1631 for a Goshawk 11 engine fan and its modifications. | 28th Sep 1922 | West Wittering \ I \ September1922 Scan37 | |
| Technical memo comparing various electric and vacuum windscreen wiper models. | 28th Sep 1925 | West Wittering \ I \ September1922 Scan38 | |
| Weight reduction on the Phantom chassis, wheels, tyres and engine. | 29th Sep 1925 | West Wittering \ I \ September1922 Scan39 | |
| Required modifications for the Goshawk Ignition & Lighting Switch. | 29th Sep 1922 | West Wittering \ I \ September1922 Scan40 | |
| Potential failures and suggested improvements for a switch and its components, including diagrams of spring washers. | 6th Aug 1919 | West Wittering \ I \ September1922 Scan41 | |
| Postscript detailing a screw failure due to badly formed spring washers and recommending material and length changes. | 4th Oct 1922 | West Wittering \ I \ September1922 Scan42 | |
| Proposal for a modified exhaust system for the 'Stork' model to accommodate the fitting of front wheel brakes. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan43 | |
| Design and drawings for the 'Stork' pneumatic brake system. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan44 | |
| Specimen Goshawk II radiator shutter and potential alternative construction methods. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan45 | |
| The front axle radius rod for the 'Stork' project, referencing scheme 1325. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan46 | |
| Design changes for an air pump on a four-wheel brake system for the 40/50 chassis. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan47 | |
| Incorrectly fitted footboards on a Goshawk-11 chassis due to a works error. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan48 | |
| Decision against raising the car's front suspension on the Goshawk model. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan49 | |
| Tests of different fans, pulleys, and cowlings for the Goshawk II engine to improve radiator airflow and prevent boiling. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan50 | |
| Comparison of wind velocity tests on Goshawk car fans with various configurations. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan51 | |
| Bump test performed on a Goshawk-11 chassis, detailing component failures over time. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan52 | |
| Issues with front shock absorbers, including failures of the aluminium casting and torn leathers, with suggestions for design improvements. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan53 | |
| The investigation of an engine gear rattle in the Goshawk 11. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan54 | |
| Tests on the Goshawk clutch pedal pressure and the improvements made by fitting a longer lever. | 11th Sep 1922 | West Wittering \ I \ September1922 Scan55 | |
| Advantages of using hardened surfaces for spring shackles and bushes over phosphor bronze. | 11th Sep 1922 | West Wittering \ I \ September1922 Scan56 | |
| Letter to Mr. Ricardo regarding fuel investigations for the 'Hawk' engine and arranging the supply of drawings. | 13th Sep 1922 | West Wittering \ I \ September1922 Scan57 | |
| The loan of a Goshawk-11 car, the trial of a 30/98 Vauxhall, and a job inquiry for a chauffeur position. | 13th Sep 1922 | West Wittering \ I \ September1922 Scan58 | |
| Goshawk 11 engine gear rattles, identifying the camshaft as the cause and outlining potential solutions. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan59 | |
| The failure of an oilless bearing for the front engine support on a 7-Goshawk-11. | 13th Sep 1922 | West Wittering \ I \ September1922 Scan60 | |
| Recommendation to fix rattling in a Goshawk-Exrodee magneto drive by fitting circular spring steel discs. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan61 | |
| | | | |
